微晶化对Ni20Cr合金热生长氧化膜应力的影响  

Effect of Microcrystallization on Stress of Thermally Grown Oxide Scales on Ni20Cr Alloy

作　　者：张洋[1] 宗广霞[1,2] 王福会[1] 朱圣龙[1] 

机构地区：[1]中国科学院金属研究所金属腐蚀与防护国家重点实验室 [2]上海海隆防腐技术工程有限公司,上海200949

出　　处：《腐蚀科学与防护技术》2011年第5期434-436,共3页Corrosion Science and Protection Technology

基　　金：国家自然科学基金项目(50671115)资助

摘　　要：利用氧化膜应力原位测量装置对Ni20Cr微晶涂层/合金体系在1000℃空气中氧化过程中发生的弯曲挠度变化进行测量.结果表明,微晶涂层1000℃氧化所形成的Cr_2O_3氧化膜中存在压应力,应力绝对值高于相同厚度的合金表面的热生长氧化膜,其原因在于涂层/Cr_2O_3界面结合好,应力释放较小.降温冷却过程中,通过微晶涂层的蠕变使部分氧化膜热应力得以释放.The deflection data for the sputtered microcrystalline Ni20Cr coating/Ni20Cr alloy was measured during oxidation by using an apparatus for in-situ measurement of stresses in oxide scales.The results showed that the thermally grown oxide scale formed on the surface of microcrystalline coating was subjected to compressive stress.The growth stress of oxide scales on the Ni20Cr microcrystalline coating was higher than that on the corresponding alloy,which may be the reason responsible to the better interface adherence of the oxide scale/coating.During cooling,the microcrystalline coating was much plastic than the alloy,which might facilitate the partial release of the thermal stress of oxide scales.

关 键 词：微晶化 Ni20Cr合金 氧化膜应力 

分 类 号：TG174.44[金属学及工艺—金属表面处理]